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参数资料
| 型号： | 0435.250KRHF |
| 元件分类： | 保险丝 |
| 英文描述： | VERY FAST BLOW ELECTRIC FUSE, 0.25A, 32VDC, 35A (IR), SURFACE MOUNT |
| 封装： | ROHS COMPLIANT |
| 文件页数： | 2/3页 |
| 文件大小： | 632K |
| 代理商： | 0435.250KRHF |
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
46
2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Surface Mount Fuses
435 Series
Thin Film > 0402 Size > Very Fast-Acting > 435 Series
Please refer to www.littelfuse.com/series/435.html for current information.
Average Time Current Curves
0.001
0.01
0.1
1
10
100
0.1
1.0
10.0
100.0
TIME
IN
SECONDS
CURRENT IN AMPERES
1.5A
1.25A
1.75A 2A 2.5A
3A
3.5A 4A 5A
1A
.25A
.375
A
.5
A
.75A
reflow condition
Pb–Freeassembly
pre Heat
-Temperature min (T
s(min))
150°C
-Temperature max (T
s(max))
200°C
-Time (min to max) (t
s)
60–120secs
Average ramp up rate (liquidusTemp
(T
l) to peak
5°C/secondmax
T
S(max) to Tl - ramp-up rate
5°C/secondmax
reflow
-Temperature (T
l) (liquidus)
217°C
-Temperature (t
l)
60–150seconds
peakTemperature (T
p)
250+0/-5°C
Time within 5°c of actual peak
Temperature (t
p)
20–40seconds
ramp-down rate
5°C/secondmax
Time 25°c to peakTemperature (T
p)
8minutesMax.
Do not exceed
260°C
Soldering Parameters
Temperature Rerating Curve
Wave Soldering
260°C,10secondsmax.
Note:
1. Deratingdepictedinthiscurveisinadditiontothestandardderatingof25%for
continuousoperation.
Example:
Forcontinuousoperationat70degreescelsius,thefuseshouldbederatedasfollows:
I=(0.75)(0.80)I
RAT=(0.60)IRAT
2.Thetemperaturederatingcurverepresentsthenominalconditions.Forquestions
abouttemperaturederatingcurve,pleaseconsultLittelfusetechnicalsupport
forassistance.
Time
Te
mperatur
e
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25C to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
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